First, the mating age of the breeding duck is too early, which not only has adverse effects on its own growth and development, but also has a low fertility rate. Egg-type ducks have sex maturity earlier. It is advisable to have an early age of 5 months or more. Meat-type ducks have a more mature sex. It is advisable to have an early-maturing age of 6 months or more. Second, the breeding ratio of breeding ratio of ducks varies greatly depending on the type of breed. The ratio of males and females is generally 1:20 to 25 for ducks for eggs, 1:15 to 20 for ducks for combined use, and meat ducks. It is 1:5-8. In addition to the variety of species, the proportion of breeding is affected by the following factors. (1) Season: In early spring, the climate is cold, and sexual activity is affected. Ducks should be increased by about 2% (based on the number of female ducks). (2) Feeding and management conditions: Under good husbandry conditions, especially when the grazing ducks can obtain abundant animal feed, the number of ducks can be appropriately reduced. (3) The length of time between male and female ducks: Before the breeding season arrives, it is advantageous to raise the fertility rate early by appropriate horticulture. The proportion of male ducks at the beginning of the gregarious group may be slightly higher. For example, the male to female ratio for egg-type ducks may be 1:14 to 16, and it may be changed to 1:25 after 20 days. In large group breeding, it is often seen that part of the male duck does not disperse in the female duck group for breeding for a long period of time, and it takes more than ten days to mate. Therefore, it is necessary to put the duck into the mother duck group early in the large group breeding. (4) Age of breeders: One-year old breeders have a strong libido and the number of ducks can be reduced. Practice has shown that too many male ducks often cause low fertility in ducks. It was determined that egg-type ducks were bred at 1:10, the fertilization rate was only 64.9%, and the fertilization rate was 92.5% when they were bred at 1:25. This is because there are too many ducks and there is a match, which interferes with normal breeding.
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